<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://automated-testing.info/t/kak-obratitsya-ili-proverit-sushhestvovanie-standartnogo-pop-apa-ot-brauzera-pri-validaczii-polej/9972/>